Calculator.



..1Nu. 707,652. l Patented Aug. 2s, :962;

E. W. SIBLEY.

CALCULATOR.

. [Application tiled July 3, 1901.=

(Hamden.)

lllll'llllllu Edward 6^ No. 707,652. Patented Aug. 26, |902.

- E. w. slBLEY.

CALCULATR.

'Application filed July 3. 1901. (No Model.) 8 Sheets-Sheet 2.

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.CALCLl-LATRA @Application med .my s, 1901.,

l No Model.) a sheets-sheet 4.

Patnted Aug. 2e. 1902.

E. W. SIBLEY. CALCULAT'UB.

l {Application filed July 3, 1901.1

8 Sheets-Sheet 5.

(No M-odel.)

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@ Hou/m13 Patened Aug. 2,6, 902.

E. W. SIBLEY.

CALCULATR. '.Aplhimion me@ .my s, 1901.y

8 Sheets-Sheet 6.

(No Model.)

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CALGU L ATR.

\App1ica.tion filed July 3, 1901.:

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(No Model.) I I UNITED STATES.

. EDWARD WV. SIBLEY, OF PROVIDENCE, RHODE PATENT OFFICE.

ISLAND, AssieNoR oF Two- Taunus To HENRY DUNs'rER, Ja., AND HORACE THURsToN, on PR'ovL DENOE, RHODE .ISLAND (JAL-CULATOR.

vSPECIFIGATION forming part of Letters Patent No. 707,652, dated August 23, 1902.

Application i'lled July 3.1901. Serial No. 67,005. (No model.) l

T @ZZ when?, zi may concern:

Beit known that I, EDWARD W. SIBLEY, of the city of'Providence, in thecounty of Providence and State of Rhode lsland, have invented certain new anduseful Improvements in Calculators; and do hereby declare that the following is a full, clear, and exact description' thereof, reference being had to the accompanying drawings, and to the figures of lo reference marked thereon, which form apart of -this specification.

. This invention relates to calculators.

The object of my invention is to provide an improved machine that can be easily and quickly adjusted to perform any of the common arithmetical processes or" addition, multiplication, and division.

A further object of myinvention is to provide improved means whereby in the act of zo registering a number on a set of indicators when a key has been operated to register one of the end digitsof the number' the operation of the succeeding digit-keys Will be automatically registered on the indicator seri'az'm.

A further object of my invention is to provide in such a iachine means whereby the act of merely depressing keys corresponding To the digits in two numbers whose product is desired will without further manipulation 3o by the operator produce at once the desired product on the result-indicating means; and

my invention comprises such further details of construction and arrangement, either separately or in combination, as will be described hereinafter, with reference to the acco1npanyingdrawings,a11d thenparticularly pointed out in the claims.

In the accompanying drawings, representing a machine embodying my present invention, Figure 1 represents a front elevation ot the machine, Fig. 2 shows a top View ofthe same. Fig. 3 is a view of the underside ofthe machine. Fig. 4 is an elevation of the left end of the machine. Fig. 5 represents an elevation of the right end. Fig. G shows a verticalsection taken down through the machine on line 6 (i in Fig. 3 lookingr to the left. Fig. is a.

detail View ot' some of the parts shown in Fig.

b' enlarged. Fig. 7 shows a vertical section 5o through the mnchinoon line T 7 in Fig. Si looltl of the machine, more fully described in theA l specification. Figs. 13 and-14 are sections of one ot the cylinders on the back shaft,-left hand. Fig. l5 is an enlarged section of twol shafts and cams, taken vertically on linel .15, Fig. 16. Fig. 16 is a perspective view ot' 6o a part of the machine with the keys removed, showing the relative positions of the cam shaft, pawl, shaft, the ratchet-Wheels, and gears that drive the front and back figurecylinders. Fig; 17 is a section of the parts 65 shown in Fig. 9. Fig. 18 isa-detail of the pawl connections. Figs. 19 and 2O show views of the front number-cylinders.

Referring now to the accompanying drawings, in which the reference characters indicate the same parts throughout the several views, 2O 2Q represent two side plates that are rigidly connected by Lie-rods 21. Two series of number-cylinders are arranged between these side plates. A shaft 22 carries one of 75 said series that comprises one set of cylinders 23 23A 23B 23C and another set of cylinders 24A 24B 24C. A shaft 25 carries the other series of number-cylinders, comprising the cylin'ders 26, 2o, 26B, 26C, 26D, 26E, 261", and 26 8o and two cylinders 27 and 27. These cylinders are preferably all of the same diameter, and the two series are disposed in horizontal alinement, as will be seen by reference to Figs. l and 2.

At the front part of the machine are arranged the keys for operating the mechanism, that are arranged in two ban ks, the lower ban k comprising eight keys and numbered from 1 to 8, and an upper ten keys,nnn1bered from 0 to 9, and also three additional keys bearing the characters A 13 C. Each of the numbered keys of the upper bank is secured to a lever 2S, that is pivot-,ed on a shaft 29, extending from one 95 side plate to the other. (See Fig. 7.) A rod 30 extends under each of the key-levers and at each extremity is secured to a crank 3l, pivoted on the shaft 29. A spring 32 coni mcse cranks with the sii?,

bank comprising 9o range of movement.

adjacent causes the rod 30 to return the hey-hars when depressed. A pair oi stops Silo serve to` limit the downward movement of the cranks 3l and give each key the saine As shown in Fig. 8, a lever 515 is pirotally mounted by its middle part on the said rod 2 9, which lever at Aits inner end has a segment-gear 33'.- The other extremities of the levers are connected hy a stepped har 3l, (seelig. 1,), the successive steps ot which lie iu the path of movement ot' the key-hars "8, respectively, so that when one of these keysis depressed it will strike one ot the steps and rook the levers 33. A

shaft 35 issee'ured between the side plates and has piroted thereon near eaeh extremity an a1-m36, on which is secured a segment-gear 37, arranged to engage the segment-gear 32 and thus the arms 36 will he rocked bythe depression of one of the key-bars 28 and the stepped har A shaft 3S extends between the extremities ot' the arms 36, on which is mounted a sleeve 39, free to more axially, hut secured against rotation oy a spline 38'. This sleeve 39 has a series of notches 40 therein helioally disposed. Another shaft 4l eX- tends iet-wees the arms .36 and has loosely mounted thereon series of eight pawls 42. The lower parte of the sawls are opposite the notches is the sleeve. On'ihe said shaft 35 are loosely mounted a series ofpairs of toothed wheels, four of the pairs comprising a gearwheel secured to a ratehet-wheel 44, and the other toni' pairs of gears comprising:y a Jfear-wheel 43' and a ratchet-wheel 44. From is. lo it will he observed that there are two said pairs oi' wheels for each of the pawls -lz :and that these pairs are disposed in reerso sequence. Beginning at the right-hand side, there is a gear and attached ratchetn wheel l-l. Then a short distance apart is loeared ratchet-wheel fifi', soeured to a gear 43. Adjacent is a gear e3, attached. to a raielrehwheel All. This alternation is oontinued to theother side oi' the maehine, where is pair comprising a ratchet-wheel lla', secured' lo a lgear 425. llourofthe pawls have ':onriterweights 421, and the others have extensions l2', which tend to more the 'pawls toward their ratohetwheels. A

llaeh el the number-cylinders of the set 23 has a gear 230 connected therewith in a manner hereinafter described, and each of the n umher-cylinders e-has connected therewith a ,eearlil Also eaehof thenumber-cylinders 26 is consented with a gear i260. A shaft ll5 A extends between the side plaies and has a series ot' pairs of ,Crear-wheels loosely mounted thereon, oomprisiugz a large wheel Alli and a small one i?, the small one in each pair heilig in engagement with one of the gears i3 or 43 and the large one with one el the said gears oonneeted with 'the number-cylinder. From Fig. le' it will be seen that the lel'tfhand ,v -mgm@ wheel in eaeh pair through these gems 1; rires a 'back eylinder and the hars 50, respectively.

right-hand ratchet-wheel in each pair drives one oi 4the front eylinders.

From the shove it will he seen that when a key-,har 28 is depressed the step-har 34 through segment-gears 33 37 will serve to rook the bar 38,1.hus moving theparts 4:2. Any one of which latter that may engage the opposite ratchetw wheel will rotate that wheel and through the aforesaid intermediate gears serve to rotate one-ot' the number-cylinders a eertain distance, according' to the distance the key-har 28 depressed the stepLbar. A stop-pin 36, secured in 'one of the side plates, serves io limit the downward movement ot the arms 36. One or more springs 36" connects one of the arms 36 with one of the siden plates and serves to more the arms 36 and the eonneeted parte baolr into oonteot with this stop-pin 36' when the key-har 28 is released. Each of the key-hars 28 hase eoenterweight 28'1that will normally retain the key-har with the key in its upper position and the bar iu Contact with a stop-bar 280.

The lower henk of eight keybars 50 is loosely mounted on a shaft 5l, that extends from one ofthe side plates to theother. A shaft 52 extends between 'the side plates below the shaft 5l. in Vertical alimentent therewith, which latter shaft carries an arm 53, arranged in vertical aiinernent with each of the keyln each of these pairs of alining hars there is a gear 5, secured to the key-har.J that engages` a gear 55, secured to the adjacent lower har. llenos when one of the key-hars 50 is depressed ,its opposite lower har will move upwardly. A spring 53' serves to return eee-h of the hars. 53 to its lower position and tho key-har 50 to its normal positios. il. har 53' limits the downward movement at the har 53. 0n the said shaft 5l are loosely mounted a pair of cranks 5G and 57,.

one at each side of the machine. Between their frontestreniities is secured astepped har 58, the latter being disposed in 'the path of movement of the hars 50 and 53 and intermediate of the hars in the pairs. quently it will he seen that when one of these keys is depressed it will ,either strike one of the steps of the step-ber and depress the latter until the opposite lower har rising will limit this movement, or else when a key to the left-of the machine 'is depressed its opposite lower oar rising will iin piege on and carry the s itep-har upward until they are niet hy the descending key, thus limitingr this move- The said crank-57 hos an extension 57', that carries a segment-,rear 57". A stud GO is secured to the left side plate of the machine and earl-iosa pin-wheel ill, to which is secured a gear The gear o1 engages this gear 652, thus rotating the pin-wheel hy the movementot' the 5? when actuated hy one of the hey-hers 50. Ou the said shaft 3S, Carried by arras 3G, is secured a gear 63, that engages the pinfwheel lil when the erms 3G are in their lowermost position. When `wlll move its maximum distance; but when key 7 is depressed the step-bar willv move downward its minimum distance which is the distance of one step. On the said stud 60 is mounted a ratchet-wheel 64, secured to the piu-wheel 6l, but on the opposite side thereof yfrom the gear 62. A rock-har 65 is pivotally mounted on this stud 60 ad- `ward, and the other -will rise and engage the notched portion 70 jacent the ratchet wheel 6i and carries a pawl 66, that engages the teeth of this ratchetwheel 64 and which has a bearing-spring 67. A stop-pin 68, secured in one ofthe side plates,

engages the .reeextremity of the pawl 66 and.

throws it out of engagement with the ratchetwheel when the rock-bar reaches its normal position. A spring 69, connected between the rock-bar and one of the side plates, tends to move the rock-bar at the A pivoted lever 70 has its free extremity arranged to be struck by the arm 36 upon the downward movemen't'o'f the small spring 7l, tending to force it into contact with one extremity of the rock-bar 65. This lever 70 has a notched portion 70', arranged to engage one end of the rock-bar at acer-tain part of its movement. A connecting-bar 72 is pivoted on the bar 36 by one extremity and has a slot in its'other extremity engaging a pin 73, secured at one end of the rock-bar 65. The operation of these latter parte is as follows: 'When any one of the number-keys of the upper bank is depressed, thus carrying down the bar 30, the bar 72 will be depressed, and thus carry the pawl downextremity of the rock-bar of the lever the latter being forced toward the rook-bar by its spring 7l. It will be remembered that the depression of the keybar 28 as soon as it engages with the step-bar 3i will causethe' arm and away from vits stop-pin 36'. Hence this lever 70 will be free to move over and receive the end of .thefIOek-bar 65 at its notched portion at this time'.` During this latterI movement of the rock-bar its pawl 66 will ride on the teeth of the ratchet-wheel without moving the same; but when the key-bar 28 is released -h-e'arm 36, moving downward, will engage the'end of the lever 70 and cause the latter to move away from the rock-bar 65 and trip thefengaging end of the rock-bar, which end will'be carried downwardly bythe spring 69. The other end of the rock-bar will move upwardly, and the pawl G6 willv now engage the ratchet-wheel G4 and rotate it a certain From the above, in connection part carrying the; .pawl upwardly toward said stop-pin 68.

latter and has a' 36 to move upwardly distance, preferably one notch. The slot in the arm 72 will permit the rock-bar 65 to rise a certain distance before the end of the rockbar 65 isreleased from the lever 70. When the rock-bar 65 reaches the latter part orf itsl upward movement, the tail et the pawl will strike the stop-.pin 68,. that will move the pawl' outof engagement with the ratchet-wheel 6e and leave the latter free to rotate. 4A spring 63, mounted en the arm 36, prevents the gear 63 moving when it is out of engagement with the pin-wheel 6l and also serves -to' hold the notched sleeve so that some one of its notches is in a position to engage its corresponding pawl. When these parts are in a position to commence a calculation, the pawl 42 at the left-side of. the machine has its lug 420 in engagement with the notch 40 at the-left` ex- Atremityoi" the'notched sleeve 39r i Now when any ofthe number-keys of the upper bank have been depressed and released the gear 63 will be rotated a distance that will rock the notched sleeve 39 through an arc equal to the circumferential distance apart of the consecutivev notches, which will result in the first left-hand pawl being moved away from its ratchet-wheel and the next pawl being brought into position for engagementwith its ratchet-wheel by reason of the lug on the latter pawl falling into the corresponding notch in the notched sleeve 39. When another key of the upper bank has been depressed and released,the notched sleeve will be roekedi through the same distance as before, and the last-mentioned paw142 will be thrown out of engagement with its ratchet-wheel,and the next pawl to the rightof this latter pawl will have its lug 42 brought into position for engagement with its corresponding notch 40,. thus permitting this pawl to drop' into eni gagemeut with its ratchet-wheel, and each succeeding depression and release of anumber-key in the upper bank will throw the engaging pawl away from its ratchet and'will bring the nent p awl in order into engagement.

On the shaft 38 are mounted a pair of arms 380, oneat each sidev of the machine", and between one extremity of these arms is secured a rod 38] The other extremity of these arms each carries a pin 382, that at the latter portion of the downward movement ot the arms 36 will be brought into contact with the camplates 383, secured to the side plates of the machine. These plates 383 will serve to rock the lever 380, and thereby cause the rod 355i to strike the lower portion ot' each of the pawls 42 and move them, so that each pawl will be forced away from the cam-sleeve and also move there away from the ratchet-wh eels 4li- 44 I Each of the number-cylindersin theset 26 is connected with its respective gear-wheel as follows: The shaft 25 has loosely mounted thereon a series of sleeves 80, each having a disk integral: therewith. The cylinder 26 Y, has a disk portion 82, having @ratchet-wheel- ICO rho

ce, else integri-il therewith. The u,ear-wheel 260 is mrefershlv interfrai with the cylinder L .1 3 s 26', which lat-ter rotates the cylinder from the intermediate geers i7, as herein,- heore dcscrihe Each ci the disks S2 carries e ein Se, on which is lpivoted e newl 85. 'From 19 will seen tiret this pa'ivl extends into the editi-cent cyiinderto the left of its supporting-cylinder end engages with .e ratchet-wheel he diereeter of the disk 81 is somewhat greater the diamel 1 ery or the disk 81 in the direction indicated hy the arrow?.n until it reac when it 'will he forced spring 8f3, and its extremity 85 will then gege one'of the teeth 'ot' the ratchet-wheel, and. thereby rotate this wheel; but the lower ies the notch 81', o this notch by a portion 85 the pnwl 85 will engage the well oi' this notch, and when it shall have moved the rs et-wheel the distance of one tooth the 'incline of the notch will serve to yforce the pawl from engagement with its tooth sind ont of the netch; but when the.

disks S1 driven in the direction of the arrow by means hereinafter described, the disk S2 and the pawl being stationary, when the disk brings its notch around to the pawl the latter will he orced'into the notch at its obtnse portion, and thereupon will have its angular portion engage the angular portion Si" of the disk 81. rhis will cause the disk v'to carry the patri and the cylinder and .gear connected therewith. around for the balence ofthe rotation ofthe disk. The ratchetwheel 83 preferably has ten teeth. Consoqnently when the cylinder to the right hand of this series makes one revolution it will move the adjacent cylinder to the left onetenth ola revolution. l The notch on the disk S1 is so disposed that this movement of, the adjacent cylirder is effected at the le .ter part of the movement of the driving-cylinder when making a full revolution-that is, preferably when the driving-cylinder is moving from SCQ'?? ILO. l

0e the shaft 25 are two number-cylinders 27 and 27, whose construction and operation one number from are identical with number-cylinder 26, except that the gear-wheels 290 are omittedi. c., the cylinder 26 when moving from il to 0l will drive the cylinder 217 the distance of nother, endthis cylinder 27 when moving from 9 to O will drive ,the cylinder 27'A a distance equal to that of numerals spart. "if Four number-cylinders 2Q dac., are loosely ousted on. shaft 22.

the number-cylinder 23, the. This gear 231i carries a pin 231, on which is mounted a pawl 232. The shaft 22 has secured thereto a disk 22() for each of the number-cylinders 23, sc., which disk is arranged to have the pawl 232 ride on its periphery. A notch 221 is made in this disk, one end wall of which snakes an obtuse angle with the periphery and the other end wall makes an acute angle with the periphery. When the gear 230 are operated liy their engaging driv'*ing-gears,tliey always rotate in the direction of the arrow,

'as shown in Fig. 19, and consequently the patri will enter the notch at the acute angle and pass out therefrom at the obtuse angle and not actuate the disk 220.

e The construction and operation ofthe number-cylinders 24 24 24" 2-1 is as follows: On the shaft22 are mounted a series of sleeves 90, each having a ratchet-wheel 91, preferably integral therewith, the adjacent collars being secured together.

a disk portion 92, having integral therewith a ratchet-'wheel 93 and a diskportion 94, the latter having a single notch 95 therein, as shown. The ratchet-Wheel 91 earries a pawl 96, that engages the notch 95 at a certain part of its movement. The gear-wheel 240 is mounted loosely on a sleeve and has pivoted to one side a pawl 97, which entends into theY interior of the cylinder adjacent to the left.

This pawl 97 is of suiiicient length to engage with both ofthe ratchet-wheels 91 and 93. A sleeve 98 is mounted loosely on 'the'shaft 22 and extends through the side plate 20,and on its outer end is secured a small gear 99, the purpose of which will be presently set forth. The gear 240, connected with the number-cylinder 242, is mounted loosely on the sleeve 98. Now suppose that through the operation of the pawl 42 at the right-hand side the gear 240 at the right-hand side is operated. Then its pawl 97, attached, will rotate the ratchetwheel 93, which will cause the cylinder 2-10 to rotate simultaneously with this -gear 240; but this pawl 97 is also in engagement with the ratchet-wheel 91, which will cause this ratchet-wheel and its sleeve 90 to rotate si- The cylinder 2e has multaneously with this cylin der but the other ,sleeve they will `all be'rotated. The ratchetwheel 91, located in the cylinder 24, thus rotating with its sleeve 90 will move freely in the direction of the arrow under its engaging pawl 97 and without actuating the cylinder 2e, and for like reasonsthe ratchet-wheel 91 in the cylinders 24sA and 24 will not disturhthese two cylinders during this movement. During thisjust-descrihed movement of the ratchet-wheel 91 in each of thecylinders 24"', 2P, and 2e the pawl 96. will move in the direction of its adjacent arrow and not engage notch 95 in a way to operate the disk 9e; but when the ger-tr 99 is operated, vas hereinafter described, so as to rotate the ratchet-wheel 91 in a direction tho reverse to l that indicated by the arrow the pawl 96l at a Certain part of the revolution willdrop into the notch 95, and thereby rotate the disli portion 91 of the cylinder and bring it to position of 0.

Referring now particularly to Fig. 5, the gear on the outer extremity ofthe shaft 22 engages agear 100, pivoted on a stud 101, projecting from the side plate On this stud 101 is loosely mounted a disk 102, having a notch 103, to which disk 102 is secured a gear 104. The shaft 2 2 also carries a short arm 105, that is normally retained in contact with a stop-pin 106 byaspring107.'` Thegear 100 has pivoted near its periphery a pawl 10S, that by means of a spring100 is caused to ride on the periphery' of the disk 102 and toerig-age with its notch when in the proper position. The tail of the pawl 108 carries a pin 110, that when the gear travels in the direction of the arrow will strike the arm 105,and thereby trip'the paw] from the notch 103. The gear 100 vengages a gear 111, mounted on a stud projecting from the side plate 20", which gear carries a gear 112, and the latter gear engages a gear 113, mounted on the outer extremity of a shaft 1145, that isV rotatably mounted in the side plates. This shaft 114 carries a sleeve 115, (see Fig.`2,) that is mounted to slide axially on the shaft, but prevented from rotating thereon by a spline 116. This sleeve 115 carries four vradial arms 117, that are disposed at'. a distance ninety degrees apart. These arms 117-are arranged the same distance apart axially as the gears 2110.

On the shaft 35 areloosely mounted eight arms 11S, each having a pin 11-9 at one side nearits free extremity. (See Fig. 0.) One of these arms 118 is located adjacent each of the ratchet-wheels 4st'. On each of these arms 118 is pivoted a pawl 4120, (see Fig. 7,) arranged to engage the teeth of the ratchetwheels 44'. This pawl'120 has an arm 121. Four curved guides 122'are arranged to slide on the hars123 124. A rack-bar 125 is connected to the under side of these guides and extends transversely of the machine. A bar 126 extends from this rack-bar rearwardly and embraces the two rods'123 and 124. The

rear extremities of this bar 12h and the four guides 122 are secured together through the medium of collars 127, that slide on the rod 123. Each of these'guides carriesa curved shield 130, having two portions 131 1.31', that embrace the T-shaped portion 122 ot' this gnideand slidethercon. (See Fig. 71.) These guides are so disposed that the d istanoe apart ot' each'shi'eld center to center is equal to the distance apart of the pawls 120. A shaft 132 is rotatably 'mounted in the side plaies and has a sleeve 133 thereon arranged to move axially, but prevented from rotating on the shalt by a spline i317. 'lhis'slccve 1233 carries i'our curved arms 1255, arranged in transverse alincmcnt with each other and the same distance apart center to center -as are the guides 122, as shown in `Fig. 3.

The upper edges of these arms have ratchetteeth that when the arms are in normal position will engage pawls 130, pivoted on the sides of the part 131' of the shield. The four pawls 42 at the left oi" the machine each have a curved extension 42', having a lug 42" at its free extension. When one of the latter pawls is in engagement with its ratchetwheel, this lug 42" will engage a lug 131 on the shield portion 131,` and thereby themovement of the pawl .in operating its' ratchetwheel will serve to slide the shield on its guide 122. A spring 137, connected to the partpll of the shield, serves to retract the shield when it is free to move. The arm 121 of the pawl strikes the extremity of the shield 180, when this pawl is moved downward bythe arm 11S, which will cause the pawl to be disengaged from its ratchet'wheel 41'. 1t will be observed that when a pawl 42 is thrown out ot' engagement with its ratchetswheel 41' the arm 42' will have its lng 42" moved out of the path. of movement of the lug 131 on the shield 130. Each arm 117, moving in the direction of the arrow, will strike a pin 119 on thearm 118 and carryr this latter arm downward until the arm 117 leaves the pin. Thereupon a oounterweight 118', attached to each arm 118, will return the arm to itsuppcr position in contact with a lug 140, secured to a cross-bar M1.. The arms 117 are disposed in helical order on the sleeve 115 and in such a manner that the arm to the lci't hand will first engage an arm 118, and upon the disengagement ofsaid arms 117 and 11S the next arm 117, which is ninety degrees distant, will engage an arm `11S next in order to thc right of the arm 118 that has been operated by the said left-hand arm 117, and upon the disengagement of these latter arms the next arm 117 will act in a similar manner, and thereupon the remaining arms will perform the same function.

0n the stud U0 is loosely mounted a cam 142, (sec Fig. 10,) which is secured to the ratchet and other wheels that are all loosely mounted on this stud. This cam has a portion of its peripheryMS concentric with its axis. Thereupon the periphery increases in diameter a short distance at 1&4, merging intoa concentricportion145, that extends for a short distance. Thereupon the periphery again increases in diameter at letti and merges into a concentric portion 147, thon arise 14S, then a concentric portion 1&0, then a. rise 150, and then anal concentric portion 151. Thus each step merges into concentric portion oi' greater diameter than its preceding one. The lin-al concentric portion in the series has a lug 152. 1t will be observed that this cam has a notch 153, that is located opposite thel cam-surface adjacent the lug 152. A bent lever is pivoted on a stud loi' on the base 20 of the machine and is retained in contact with the cam 1,-12 by spring 102. (See Fig. 11.) The vother extremity oi the lever 100 has a segment-gear 163, engaging a IIO segment-gear 164, that is secured to a segmentgear 165, pivoted on a stud 166 on the hase. This gear 165 engages the rack-har 125. commence a calculation, the end of vthe levery 160 lies lin the note 153 'ot' the earn 142, and when the rack 57" throngh the operation of one o r more keys has caused the ratchetvwheel 64e to advance the distance of four of zo its eight teeth the end of the lever 160 will he loronglir, to a position on the cani-surface 113 that is adjacent the cam-surface 1deibecause of the rotation of the cam; but when the `ratchetwheel 64 is advanced the distance i5 of another tooth the end of the lever 160 will travel up the earn-surface 144 and onto the surface 14E-.5, and thereby he moved on its pivot, which will cause the segment-gear 165 to move the rackbar 123 to the right. These 2o latter parts are so proportioned that' by this movement oil the raclnloar and the arms 117 'connected therewith the latter will oe moved a distance equal to the distance apart of the arms 118. This movement of the arnis 117 -Will bring' each of them into alinernent with an arm 118 to the right of the arm 118 with which it Was just in alinement. The next ad Vance of the ratchet-Wheel,Y 511 will bring the end of the lever 160 upon 'the cam-surface 3o 147, which will move the rack again to the right the same distance it was moved by the previous movement of the cam, and thereby bring each of the arms 117 into alineinent with arm 118 to the right of those with which they Were just previouslyin alineinent. Another advancement of the ratchetevheel 5-1 one notch will eiiect a similar advance ment oi the arms 117 in virtue of the lever 160 having: its end brought up onto the earn 4o surface 14,9, and another such movement orl the ratchet-wheel (it will bring the end of the lever 1GO up to the cam-surface 151, and thereby advance the arms 117 the same distance as they moved at each previous step.

.15 The lng 152 will prevent the rotation of the cam after the end of the lever 160 has passed over the caniesu'rface 151. Onthe said stud 166 is pivoted a lever 167, having.: one extremity projecting at the front of the mn.- gs. nine at its lower portion. The other extremity of the lever 167 carries a lug 16S, en gagging" an annular groove 169 on the notched sleeve. (See Fig. 16.) the rockingl of this lever 167 the notched sleeve 39 will be reciprocated on its shaft and thereby through the arms 170 will move the pari/ls ft2 along the shaft 11. This movement Will serve to change the pawls'from a position to engage the ratchet-wheels 44 to a position to oo engage the ratchet-wheels 44'-, or vice versa. 0n the shaft 20, as shown particularly in Figs. 4: and 7, is mounted a bent lever 171, having the keyA at its forward extremity. `Atits rear this lever has a segment-gear 171', o5 that engages a gear172, mounted on the extremity of the shaft 22. When the key A is depressed, the segment-gear 171 will rotate .Vhen the machine is in position toA the gear 172 for one revolution, which will rotate the disks.

On the shaft 132 secured a arin 1733, to which is pivoted a connecting-bar 1"1, the latter heine' pivoted to the arm 1,70. Consequently when the har174 is raised by the lever 170 the shaft 132 will be rocked,A tuus moving the toothed arni ont of inent with its pai/vl 136, and therebypermitting the spring 137, that is connected between the bar 123 and the shield 131, to move the shield upwardly.

As shown in 2, the key C is attached to a bent lever 176, pivoted on the shaft 29, having; a segmen'ogear 17,7, that engages gear 178, mounted on the left-hand lever SO. When the key C is depressed, this gear will he rotated one revolution, carrying with it the series of sleeves 8O and d isls S1 in 'the direction o'i" they arrow on the lattrn-y VYThese disks when the notch cornes to a position fo engage with the'pawis S5,as shown in. Fig. G, will carry the cylinders 26 2G, tre., to which these lnawlsare connected, around for the balance of the revolution; but when. the key C is-retnrned to its normal position by retractile'spring 179 the disks S1 `:vill evidently rotate in the reverse direction. Thedisks 8O will move freely under the pawls 85 Without disturbing the number-cylinders 26.

The key B at the left of the upper henkie.

secured to a bent lever 18?, pivoted on the outer extremity of shaft E39.. This lever Si) has a segment-gear 187 on its rear extremity that engages the said gear'104, secured to the disk 102. A retractile spring 182 serves to return the lever to its normal position after being depressed.

A har 1D0 extends between the side plates at the front of the machine and has pivoted thereon a lever 191, that is pivotally oonneoted with the key-bar of the key A cya rod 192.' Another lever 193 is also pivoted on this bar 190 andis pivotally connected with the key-'oar of the key l by a har 191. The free end of this lever 192i` is arranged to he engaged bythe front of tiieifree end of the lever 1,91. A lever is pivotally inonnt` ed on the rock-bar 53, so as to swing rearwardly and also transversely of the machine opposite the key 4C in the lower banku This lever 195 has a curved arm 1,95' in engagement With a stop-pin 191 on the free end of the lever 191 and is retainedin contact therewith by a spring lilo. This lever 195 at its upper straight portion has a short arm 195", extendingtoward its curved arm. On the free end of thelever is a stop-pin 103', arranged to engage the larm 195" when the lever 193 is rocked, but is of a length to pass downwardly' past the curved arm with out affecting the latter, which is hent forward slightly at this portion to avoid engage- -ment with this pin.

The bar 171 ofthe key Alias pivoted thereto a har 197, having link portion at its other extremity whose slot 19S engages a pin 121 on the key-bar 50 of the key S below the key A. Likewise the bar 176 of the key C has pivoted thereto a bar 200, having a link portion 201, whose slot 202. engages said pin 19).

The operation of my machine is as follows: When it is desired to use the machine for addition, the lever 167 must be moved to its full limit to the right, which will bring the pawls 42in a position to engage with the ratchetwheels 44', which latter, it will be reinembered, operate the number-cylinders 26 26" through the several intermediate gears. When the pawls 42 are brought to this position, their arms 42 will he moved transversely out of engagement with the shield 131. Suppose it is desired to add the following numbers: 48,875,323 and 62,437,516.77 The key4 of the upper bank is first depressed and released. Then the key 3 of the upper bank is pressed and released, and in the same manner the keys of the upper bank corresponding to the remaining digits of this number are pressed and released in their order. When the key 4 was depressed, it went through a certain arc and then struck a step of the step-bar 34 and carried this down for the remainder of the movement ot the keybar, thereby moving` the gears 33 and 37 and moving the arms 36 upward. The latter arms will carry the pawls 42 upward and the pawl at the left of the series will engage its ratchet-wheel and through the intermediate gears rotate the number-cylinder a certain distance. This distance is governed by the distance the step-bar 34 is carried downward, the various parts being so proportioned that the depression of the said key 4 will ad- Vance the number-cylinder 26 the distance or" four numbers-that is, supposing 0 to have been at the top of the cylinder, this movement of key 4 will bring the numeral 4 to the top. This rotation ofthe numbercylinder 26 is synchronous with the downward movement of key4; but when the said key 4is released and is returned by the springs 32 and bars 30 to its position the spring 32 will retract the pawl-operating arms 36 and through the mechanism hereinbetore described will rock the notched sleeve 39, which latter will throw the left-hand pawl out of engaging position and will bring the next pawl into a position to engage its ratchet-wheel. `When the key for the next digit i3 is depressed, it will carry down the step-bar 34 a distance somewhatless than it was carried down by the key 4, and the step-bar will move the said engaging pawl upwardly and rotate the n umher-cylinder 26 until the number 3 is at the top. On the return of this key 3 the pawl that has just operated the cylinder 26A will be thrown out of its engaging position and the next pawl to the right will be brought into position of engagement with its ratchet-wheel. In a similar manner when the key 8 is depressed that number will appear on the number-cylinder 26B, the neXt digit 7 will be shown on the cylinder 26C,

and so on till this iirst number of eight digits reads on these eight number-cylinders. The first number having been p utdown,there upon the key S of t-he lower bank is depressed, which through the step-bar 5S Aand rack-bar 57 and connected parts will serve to rotate the notched sleeve 3.() in a direction the reverse of that in which it has been moving and the same distance, so as to return it to its original position at the beginningr of this calculation. Thereupon the key 6 of the upper bank corresponding to the first digit to the left in the second number is depressed. In the previous operation it will be remembered that when the key 4 was depressed the number-cylinder 26 was advanced to the number corresponding to that ofthe key depressed; but as this cylinder has been moved to bring the number 4 at the top, upon the pressing of the key 6 it will be moved the distance of six numbers, which will make a complete revolution of this number-cylinder 26 and bring O again to the top; but, as previously described, when any of the cylinders 26 26, tbc., moved from 9 to O the number-cylinder adjacent to the left is advanced the distance of one number. Consequently the number-cylinder 26 will advance the number-cylinder 27 from O to 1. The next digit in the second number being S, this key in the upper bank is now depressed, which will advance the numbercylinder 26 through a distance of eight of its numbers; but as this cylinder was moved to bring the number 3 to the topit will be now advanced eight more numbers, which will complete its revolution and advance one number on a second revolution,and when this number-cylinder 26A was moving from 9 to 07 it would advance the adjacent cylinder 26 one additional notch. The cylinder 26 having stoppedat O when last moved will thus be moved tothe position of 1.7 The next digit being 4' it will be apparent from the above that the cylinder 26B, that was moved to the position of 8, will be advanced through the balance of a complete revolution and will have the figure 2 exposed at the top; also, this latter number-cylinder on moving from 9 to 0 will advance the cylinder 26 from 177 to 2, and each ofthe succeeding digits of this latter number being operated on the upper bank will act in the manner just described, thus giving on the eight cylinders 2G 26A, duc., and cylinder 27 the sum of these two numbers, which is 112,312,839. It there are three or more numbers to be added, the process is exactly the same as just described. When the second number was made with the keys, the sum of these two appeared on the front number-cylinders. Then the third number is treated in like manner by simply pressing corresponding keys in the upper bank, which process will evidently simply add this third number to the sum of the other two numbers, and in precisely the same manner each number down the column is added to the aggregate of the preceeding IOO IIO

ones. In this machine I have used eight of these number-cylinders 26 261, dsc., which will add a series of numbers, none of which contain more than eight digits; but by simply multiplying these cylinders with their corresponding keys `and intermediate mechanism the capacityof the machine can be increased as desired, or, on the other hand, a less numfber of cylinders 26, the., keys, &c., could be used, corresponding to the number ofdigits in the largest number it is desired to work with. Next, suppose it is desired to add numbers having less than eight digits-for instance, thirty-four 'thousandV and five thousand and eight. The first step in the operation is to find the number of digits in the first number to be added. Then the key in the lower bank corresponding to this number is depressed, which in this instance is 5. This key will depress. the step-bar 58 a sufficient distance, and thereby through the connected parts rotate the Vnotched sleeve 39, so as to bring the pawl 42 into operative engagement with the ratchet-Wheel connected with the number-cylinder 26C. It will be observed that this cylinder is the fth one in the series counting from the right, as is the case with this key 5. Thereupon the key 3 of the upper bank is depressed, which will serve to move the pawl 42 upwardly for a distance sufficient to drive a ratchet-wheel and connected number-cylinder three numbers; but as the pawl that operates the cylinder 26C has been brought into operative position, as just described, this pawl upon the operation of the key 3 of the upper bank will advance the number 26C and bring its figure 3 to the top. The next digit in the numberbeing 4, by pressing the key4 of the upper bank the number-cylinder 26D will be advanced to bring its number 4 to the top, as will be readily understood. The next three digits of this number are naughts; but by inspection of the front row of cylinders it will be seen that this number 34,000 is now shown, and we may proceed to the next number. Every time we start on another number it is necessary to first ascertain the number of its digits and then depress the key bearing that number in the lower bank. Hence we now operate the lower key 4, which, as will be readily understood, will bring the pawl 42, that operates the cylinder 26D, into a position to engage its ratchet-wheel. Thereupon the first digit in this number being 5 we operate key 5 of the upper bank, and consequently move the cylinder 26D through the space of tive of its numbers. As the previous operation of this cylinder brought the figure 4 to the top it will be now advanced to bring 9 to thetop. The next digit in the second number being 0, on depressing the 0 key of the upper bank the next number-cylinder will not be advanced, for the reason that nothing is to be added on this cylinder; yet it is necessary to depress this key in order to rock the notched sleeve 39 and throw the pawl that would operate the cylinder 26E out of its engaging position andthe pawl next in order into its position of engagement. The succeeding digits of the second number being 0, the key 0 is again depressed, which will simply throw the pawl, now in position of engagement, out of position and bring the pawl at the right of the machine into position of engagement. Thereupon as the next and last digit 'is S this key is depressed in the upper bank, which will add this number onto the number previously added in the last cylinder 26; but as O was left in position by the previous number this cylinder will now have 8 at the top. Instead of the abovementioned steps in the last process of operating key O twice for these two digits in the second number, as an alternative we may depress the key in the lower bank correspondingl to the position of the digit S of this number-that is,operate key lin this bank, which will at once throw out of operative position both the pawl corresponding to the numbercylinder LGEand the pawl corresponding to the number-cylinder 261" and will further bring the pawl that operates the cylinder 26 into its position of engagement. The sum of these two numbers- 39,008-will now appear on the forward row of cylinders.

When it is desired to use the apparatus for the process of multiplication, the lever 167 is moved to the left, which will move all of the pawls, with their connected parts, to the right and bring them into alinemeut with the ratchetwheels 44 instead of the ratchetwheels 44, as in the process of addition. In the multiplying process themultiplicand is to be shown on the cylinders of the series of the set 23 23A 23B 23C and the multiplier is always put on the cylinders 24 24A 24B 24C. The right-hand digit of the multiplicand is always put on the number-cylinder .23C and the other digits of the multiplicand on the IOC IIO

cylinders to the left in their proper sequence.

Likewise the right-hand digit of the multiplier is always put on the cylinder 24C and the other digits in order on the three cylinders to the left. Suppose it is desired to obtain the product of thirty-five multiplied by forty-six. From the preceding we must place the digit 3 on the cylinder 23B, which is done by first depressing the key in the front row whose position in its bank correspon ds to the position ot this cylinder 23B in the rear line of cylinders, in this instance key 6. This will result in bringing the proper pawl 42 into position of engagement with its ratchet-wheel to operate the number-cylinder 23B. Thereupon the key 3 of the upper bank is operated, which will move this number-cylinder 23B from 0 to through the medium of one of the pawls 42; but during this movement of the pawl its lug 42 was in engagement with the lug on the shield 131 that is opposite the arm 117 and would draw this shield down for a certain distance, and the latter would be retained in this position by the pawl 13G ensiiieide and gnidemihe ermebank is opeiaiieci, which wiii reime 'Lilo oyiiodei-23C nntii the nlimbe 5 1 opeens es @he iop through the. medium of e, pew@ next io the,

light of theone iba-; woe iam i'efeiieri 11o. The io'veinenbof ihis 'gewi will move ine @hield ogiposi'ewhe erin 117' iinoiigi distance proporiionete efbno disianoe ietser pawi has meveci the -nnoibeifoyiinsi@1230.

Next Lize inniipiieif i 46 is ont Lignon the @yiindei'e :2%. There being two digits in 2Rois minoei; the iist one to une iofb ninna be pui on tia/.e nnrnbenoylincier 221B. This ie done by. lsi; @lensing the key in fie 10i-rei oorreepending; in position hoihoi', of iiiio numberoyiioeiL-iibao is, the 4 1y 2-Wi`iioii will oring e pewi into position. to gommate, through intel-mediate this ojfiinfiei 24B. Vihen zii- Lile beginning of this processo? .innitipiiomion ioy 6 was operiiief, 'the com lei-2 rotated through iiiree-eigiiiis complete i'evoiniion, and Mie key 5 of Liie ion' i* bank Wee eperaied the 03,111 142 is adi/ence@ oneeigiiih compie@ Lion and the egcremiy iii@ io er lo@ has moved reiaiii'e no the eamewswe ai posi sion edjaoeni, the iii-si; Siep 1L toenam, Dui-ing einem if-revoiuon of of Sio-2e ehe exmenii f thoie-e 160 reoizii: ed :ii one :same diei noo from *he exis of ziie eem and the carriage eousji' 'ey ne 117, L e., have not been change@ ieieive io i -e 114, when the key :2 pieseefi, one above described, Ehio can; wiii be advanced ihre/2 eiffiiilis of a revolution efni @euse the engagiog poiiio'o o1 the iever 1GO te ascend Liiree steps of the @ein onto the cem-eiwfac-.e 115:9., New eeoi'i sie@ the@ ibis end of the lever was cause-S; to eso-end wonkif move the lever away from @he exis of the and canse ih to Slide bile eaiiiage to theiightfoi' snoh a distance that Wiii nieve the ohieici from a position :idjzieeoiz one of the arms 118 to the next one io the ijigii. lievingjuet moved fenree stepshe shield adjacent the man 117, Limi as the former, posifion was in posiion of engagement with ihe numberoyiinder 25C thiougii iz'ieiinediete parte, is thereby brought imo :i iiiosibion of engageme wigin the mimbeocyiiadei; through imeimediate pn; is, As joer, swieci, the eiiieid op posite ine' arm. 117 haa eeen brought inte aiinemenia' with the gear-125', that imiireobiy engages the number-cylinder but when the gnre 57 was een on 'one cylinder 23C iii Wiii be iemembei'ed that the shiel opposite the fir-ni 11?' had been moved downw-(n'diy :i eeiiain fsizinee pi'opoi'oionaoo Win he move men of his eyiioiei io @e5 ig'lie 5. The moveii: L 'than breng-iin his s eid in @oemtion Peize-.Live to ifixe ejsiinc (ieniiy bring' the :icijzieonio eiiieiegi oopoeite the :mii 117 in operative ieinion wiiii iiie goor 43 connected with she oyiindez.' 23E, end dois eet-mentioned aiieigas pi'eviooey .eM-*e115 was moved downweriy fo? a Gerwin fiis, y@

proportionate with iiie movement of the flow?. 1i] is new in orde? to sei; the digit" of me mniipiiei on the) nninoei'-oyiiiide whioh is done oy guessing icey in the opper bank. Nowwnen Lois keycie-epneeeeditwai. "5 rotante the oyiinier 243 asiei'eiobeoi'eoef scribed, wrongs. e distnee of foin on' zuid when any of the fom efli.

24, &o Tomte@ one n rotaie t'ne am" 117 (eee 5) 5:,- uien7 theeV mais i new iomi 'upon mei-oon ionico of U' of this key L I the beginning o Lio rois-- ion of the arm 11 i?g end be arm. 117" wiii move the om: 118 ajafoent ciowowm diy find i'otoliei, 120 wii :'omte (ne edjeieeof Wheei uniii Like znm. 121 of 'd le pawi ei'i es iik-e Vjeoozi'u @dem 13Ej Wiiioii wiii thro? pawi '120 off from im i'iiiehe-Wieei it o for the bziianee oi he, iiioife'ei anni 118; imi. iiiie iii* eiiioneoi iis oope Live pw: i. tiel of the anni of iiie mio.-

gears, :nove ifie o distano@ revelan moved :and will nomine? 3 ai iii-3 the@ i oei ninoly o;

on of lauten mo Mimmo jfrili iis coop wii, Diiiongi Laie the ifjeoen wheei 21" im* thrown oui; oy adjacent siiie this Easier siii-ei@ hee been moved iowna such a distance when the efdjaoen; pa. was epeeed to bring' Bhe number 5 5 o eyiindei' 23" io the top iie thiss pnwi nripgged when it Shadi have romte i 41 o suiiioieut iszeeee to rotate Lilo c;

bfa dist-ence of iivo iguree. Upon ine Second revoimion of iieerms 117 111 weee two asses just described are repeat-ed in Lila seqnenoewihan ie 'no enit, the oyiindo mi winced again for i die e of three f which 4will i2 1re 6 to the iop, :irais continuing 'hie revolution iiie C 26 ioe iiia-noed I S-flf) fore and be veiled which Wiii iyfibt, admnee die iefhiiavwi. fnigaoent figure, and these ewo nnmbeioyiiiers i reali 70. in e; simil i manner 313e '-13 1.55

oompiene revolutie. oi he arms w thirty-five io the i TU, ihns bring-jing 0n Lize number-@ndere v 1Lhe ernisil? were revolved omiineo, five wiii oe onoemoie :,iiide, thus' b: 14-0 at 'eine Loo of me :onoiheooy sitioo, the @aan 111i: ','iii noieh., which Wiii feeni; m

it. f@

the arme 1l? 'and the several ehiells ll to'- tiie right and bring the shiei. opiigsite the erin 1V! into engagement with the elim 118 in cooperative position Withthe number-cylinder 26C* eind'ohvionsly the shield 11?' into o0- operetive position with the number-cylinder o The next eten in the proc-ess is to' platee the other digit 6 oli the multiplier oo the nui'nher-Cylinder 241C; which is done by dethe ratchet 44 serve to rotate the cylinder 26 a distance or three numbers., since ite ati- 'jitoent ehield remains eet in the position previously desorihed. The succeeding pert'of this revolution will @euse the erm 117 to move the oyliiide 2o"l the dieten ee of live n u inbers;

' 'het tiieee tim Cylinders 26F and ZG having erich hr. i left at the position of O et the Qonipletioe of the jrevioue Step, these two numheeoylindere will now reed andthe four ejvlindere to the right in this Series will regieter 1.435. Upon. thenext revolution of the erme 117 oylinderQiiF wili again move three i: ezio the -oylinder lxi; a distance ol five ureelwhieh will evidentlyedrl thirtyiive on." the registering-@57h11dere, thue setting theni et "1,470." Likewise the third revolution ywill efirl th lriy-iive and register the unmber 1,505. And the completion of the sixth oi' theeerevolntioue,ti1e nuuioer i 1,610 will evidently appear on the seid four cylinder.

which is the product of thirty-iive and 'forty- .-ix. it will. be seeethet this niultiplioaud thirty-ve wes, in friet1 first multiplied by :i number constituted of the first digit to the left., e n umher of nengiits corresponding to the renmiiiingdigiteol' the inultiplier-iu other worde, forty- Which ley the simple operation of depressing the key 4i efterthe m ultiplioend had been registered brought the product 1,440 in the front row o' cylinders, and, secondly, the multiplieend is multiplied hy the remaining* digit of this multiplier-that is, 6-ziud et the seine time this produot is added to the seid product, which will eviientlygive thev true product of these two numbere, Inlikeniennerwhenitisdesired to multiply two numbers, of four digits each the multiplie-find is ret eet up on the oylinders 23, 23A, rizo., and then the ni-ultiplierie set 'up on the cylinders 24, :2i-i, 65o., sind this will uponr the Isetting up of the lest multiplier have registered the produet of these two numbers-on the front row of number-cylinders. This lest operation ie accomplished, broadly speaking, by tiret multiplying the multipliortnd bye number oonstituted ot' the digit et the leftl of the multiplier, with three neuglite et ite right. Thereupon the multiplica-nd ie multiplied by e number composed of the seoou'd igit from 'the ieft in the mnltipler and two ireugliis to its right, and this'produot is the n u meer eonni..

edeti et once to the prodiiet hiet obtained and this snm rek.) the :front row or cylinders. Nerf E eed le ninl- 7c tiplie oy e, munter i` the third digit from 'the left, havin iight to its right, which proeluet e the gate of the preoefiing profi enii finally the inultiplioenci'it4 nltipiie f the remaining 1:3 digit of the mnltigli-J l tt oifodiiot et onee addefi to t" three products, i product of the eeid ii ext.l pposeitwes desired. eet-mentioned product the produet of the multiplican@ end any number ofinot greater than four digits. In this ease ell that is eeoeeeery ie to bring the fouroylinders 24 2&1 292 with O at the top. Thereupon the new multiplier ie S5 caused to be shown on the eet ef cylinders 2e 24A, the., es in the previene operation, which willnot only mnltiplythe ni uliipiioeiiri tiiie new multiplieighutvrill edd the procliiotthere of to the prodnoto'et merlin the preoecling op" eration, end, if desired, the Seite renltielieend may oe muitiriliedmy thirifi 'muitiplier and this latter added to 'the reenit oi the preeerlizeg opi# fr enti lil-'ewiee any number of mniti le eneoeeffnon he caused to'edd their protiuot to th' .t e. ceding opereriiion.

Next, suppose in division-for inst? "h A. I. 1 ie oeeiretl. to -lo e @romeni ee, we here :t divisor multipiioenrl on oyiinri scribed in the above prou' tion. Here, :te deecii of multiplication-,trie carriage by the eem t the letter pertl of the key 5 in setting fp clix/*iwi*2 will put the shields that here eeen eet' when the Seid lieve and 5 ooerete-Ci in A i L t' position of nx/'ith the eylii 26126026. onowv 'were with.

digits of the dividend. er

It we think. tiret this numhelywe d. heink, whieli wii lo hy one thou of 'the three euieloe 165 on the three o ltipiytlze cli v i.. the oper;

, be eontaine iii the number Dwice iustead cf @Tess-ieg key l of ,the uppei benk. We weuci opei'ete' key rfi, and heebf in feci, `zumitipiy eue hundred and siztjfsve by two bhousmi, which weud bring 230 on'the same three eyiziders 25C 26D 26mg but this see ie tee iienee we must. ieset the cy'iindere 2G, 5% anni aise the eyinez's 24,

Gai)

Li/@Wall 5113"0," ien again piace figurel heeej/lieder 24, end tiiereey zo eyiiiideife 2bTF Still iloaiingthie key wwe? a e the ilumine? 1,815 ebebe time the iii he queleut; but if @he seid diiereiice Heen the i "tent 'number and AZLGSZ "feite the number' we then il ietmiii ey depressed, we ,fe in 'the 1eme number on the from;

hundred and Sixty-five ieee thea reiease the depressed me meri-i :step ie to piece the succeedin 'iie q etieuis on the cylinder sedie; ease, We press the ank in numerical order si number ou the from mw wat is one hundred ami ieee than the numbei 20,377 e @heiieplesse keys. in prefwine, We operai-e the keys i untii we obtain uumbei w ef eyiiners equai to this 5,?/75 m' a number non one hunn --ve les@ i ie iesei; the firent Tow ef il ie depreese., which, oper-4 718, iiimgwhich, it) will be rememeause their notches 221 o engage Any.

minime? 165 en the number ham this number.

2, connected with-the cyl 'i); but ee key C is con# i'eeet fue ey'iiiia is operi fom' @grim-me' 1 eeryege Seppe' paws had 2102', Le' iebheil. @Geit 'this wiii. be eee@ m foei; She lever iofgeratek; :eL four @une ew key depressed., elem-gem 181,236. i2 a Cireetou zo @rete gears engage f l0() am" J. ia'iie with reatien ef e. se-

@heil-Wheeis; ineens for "e mi eine Le be if; ena e en; meme T w e f wieg any mene with desired its mischet'w .aie combination e e5 izeilet-xafh driven. from ef :':ehw n-*iieeifs5 io having s@ ei" A .wl iieaefm; each pawl being dispeee in :Lallement wish one ei. saif r2,tehes-Wiieeleh of iigi5i;eys3; means fox' causing the 0i 'i my @if Said keys te move'bhe -c'i-,iiu rg mit and iiiereby se 11 move en inciif'ffitior Hai,- the leiter registers the digit. of me @new 'i e and means for bringing; mi? sitiori of e11- ser,

portion of the sleeve; means for reint-i ing the'sleeve, and thereby `bring any ot" the notches into engagement with its pevli sind plane the letter in position to opere-te the no@ neoted indient r; and ineens for causing the operation of any or the seid keys to more an indicator so that the letter registers the digit of the operated hey. i

4. yiin e calculator, the combination of sse,- ries of digioindieeters; nsetof ret-ohet-irheels; ineens for oensingeeoh of theindieetors to he driven from one ot seid retohenwheeis; n. theft having n series of newls thereoin eeen pewl being; disposed in eiiineinent with one of seid ratchet-wheels; e set of digit-keys g s rotateble sleeve eonneeted withV the shni't and er ranged to roei; the parvis in snoeessionz, e second set of keys; ineens foroensi'ng the opere.- tion ofv eech letter hey to rotate the sleeve end thereby bring pewl into position of engagement to operate the indicator eorrespending to I'he letter key operated; and means for causing; the operation of of-the seid digit-keys to move the pewhenrrying shaft end thereby move indionor so thet the letter registers the digit of the operatingkey.fl i

lne enflenlntor, the combinetin of e seriesc .igiteindieetorsg nsetot ratchet-wheels; ineens for ee. usine: each o the indicators to be driven'rom one ofthe ratchet-wheels g shaft having e series f pnrvls thereon, eeen pewl being disposed in slinement with one of seid ratchet-Wheels; menne for loringing any de- Asired pewl into engagement with its ratchetwhelel n. pair of levers; ineens for causing the levers to roei; seid pewl-cerryng elia-ft; e step-oer 'connecting seid levers; e set ot' movable digit key-hers; means for retaining the keyfoers norznellyin slin'exnent; the key' here being .so disposed es to engage respectively the steps of the step-ber end thereby rock seid levers,

G. in n calculator, the combination of e. series o digit-indicators; seperate ineens for moving esen of the indieetors and sense it to register any digit; n pair of levers; e step her connecting seid levers; nset oi hey-bers, eneh having; n gear thereon; ineens :for retaining the keg/*hars normally in elinernent; e rook-ber located opposite eeoh hey-bnr and having e gear thereon; the seid gear on each lzey-ber engaging the gear on the opposite rook-her; seid step-bar being located between the set ot' lief/bers and the set of 1ookbnrs, 'with'the steps disposed to he eeill engaged oy e key-her and its opposite roet-loer; n eet of digit-keys; one of seid levers being en ries of digit-indicators e set of reteheteeneels; f

means for causing eneh. of the indicators to he driven from one of the ratchet-Wheels; n shaft having e series of parvis thereon, each pewl heing'disposed in elinernent with one of seid ratchet-Wheels; ny rotatable sleeve connected `with seid shaft end arranged to rook the penis in succession; e gear on seid sleeve; n -pnir oflevers; oneens for causing one of seid levers to rotate seid gear; e step-her connecting seid levers; set'ot' key-hers, each heving e gear thereon; means for retaining;V the 'keyhnrs nornlellyrin elinement; e roolobrur located opposite enel). hey-her end having e gear thereon; the seid gear on eeoh key-bar engaging the neer on the oppositeroohubar;

seid step-ber being located between the set y of key-hers and the set of rock-'ners with the steps' disposed to be each engaged by e. key-her and its opposite rook-bar; e set o digit-myn; and means for Causing the operation et of 'seid letter keys to move the pani-carrying' `shaft and thereby operate en indioator so that the letter registers the digits of the operatinglzey.

S. In e calculator, the combination of'e series of digitindioetors n set of retenetwheels; l

ineens for Causing each. of the indicators to he driven from oneot the :ratchet-Wheels; e. pair of pivoted arms; e shaft carried by the free extremity of seid arms; e. series oi psi-wle mounted on seid shaft; eaeh pnwl being dis posed in nlinexnent with one of said ratchetwheels; e .rotatable sleeve mountedv on said shaft; means on the sleeve for rocking seid pawls in sueeession upon' the rotation of the sleeve; a. set oi' digitdieys; means for causing the depression of any of seid keys to rook sei d arms and thereby Cause s pew; to move n IIO retchetuwheel end operaie en indieetor; and

means for causing the return movement of lseid ermsand pewls upon the release of e depressed key, to rotate said sleeve land thereby move the pewl just operated sway from its engaging ratchet-Wheel, end also move the nd- 4jacent pswl into position to engage its ratchet-- Wheel. h

9. in e calculator, the combination of e series of digit-i ndice. to rs; n set of ratchet-wheels; ineens 'for causing' eeen oi the indicators to he driven from. one ot' the rntoheterheels; e peil of pivoted firms; :i snnlt onrried oy the free extremity of seid arms; a. series of pfiwls mounted on seid Shaft; nach pnxvl being disposed in nlinenient with one of seid ratchet- AWheels; a, rotetnhle sleeve mounted on seid shaft and arranged to bring successive pewls into position of engagement; e pivoted lever ranged-to @ense any one ofseid indicatorengngenient 'with seid sleeve-gear; e second 

